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Wyszukujesz frazę "fractional order controller" wg kryterium: Temat


Tytuł:
Fractional order PIλDµA controller design based on Bode’s ideal function
Autorzy:
Bettou, Khalfa
Charef, Abdelfatah
Powiązania:
https://bibliotekanauki.pl/articles/27312016.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Bode’s ideal transfer function
fractional order control
classical PIDA controller
fractional order PIDA controller
robustness
Opis:
The fractional order proportional, integral, derivative and acceleration (PIλDµA) controller is an extension of the classical PIDA controller with real rather than integer integration action order λ and differentiation action order µ. Because the orders λ and µ are real numbers, they will provide more flexibility in the feedback control design for a large range of control systems. The Bode’s ideal transfer function is largely adopted function in fractional control systems because of its iso-damping property which is an essential robustness factor. In this paper an analytical design technique of a fractional order PIλDµA controller is presented to achieve a desired closed loop system whose transfer function is the Bode’s ideal function. In this design method, the values of the six parameters of the fractional order PIλDµA controllers are calculated using only the measured step response of the process to be controlled. Some simulation examples for different third order motor models are presented to illustrate the benefits, the effectiveness and the usefulness of the proposed fractional order PIλDµA controller tuning technique. The simulation results of the closed loop system obtained by the fractional order PIλDµA controller are compared to those obtained by the classical PIDA controller with different design methods found in the literature. The simulation results also show a significant improvement in the closed loop system performances and robustness using the proposed fractional order PIλDµA controller design.
Źródło:
Archives of Control Sciences; 2023, 33, 2; 425--458
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional order PIλDμ controller with optimal parameters using Modified Grey Wolf Optimizer for AVR system
Autorzy:
Verma, Santosh Kumar
Devarapalli, Ramesh
Powiązania:
https://bibliotekanauki.pl/articles/2134890.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
integer order PID controller
fractional order PID controller
automatic voltage regulator
evolutionary optimization
Grey Wolf Optimizer
Opis:
In this paper, an automatic voltage regulator (AVR) embedded with fractional order PID (FOPID) is employed for the alternator terminal voltage control. A novel meta-heuristic technique, a modified version of grey wolf optimizer (mGWO) is proposed to design and optimize the FOPID AVR system. The parameters of FOPID, namely, proportional gain (ΚP), the integral gain ( ΚI), the derivative gain ( ΚD), λ and μ have been optimally tuned with the proposed mGWO technique using a novel fitness function. The initial values of the ΚP, ΚI , and ΚD of the FOPID controller are obtained using Ziegler-Nichols (ZN) method, whereas the initial values of λ and μ have been chosen as arbitrary values. The proposed algorithm offers more benefits such as easy implementation, fast convergence characteristics, and excellent computational ability for the optimization of functions with more than three variables. Additionally, the hasty tuning of FOPID controller parameters gives a high-quality result, and the proposed controller also improves the robustness of the system during uncertainties in the parameters. The quality of the simulated result of the proposed controller has been validatedby other state-of-the-art techniques in the literature.
Źródło:
Archives of Control Sciences; 2022, 32, 2; 429--450
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional Order Sliding Mode Speed Control of Feedback Linearized Induction Motor
Autorzy:
Fetene, Yeshiwas
Shibeshi, Dereje
Powiązania:
https://bibliotekanauki.pl/articles/1193868.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
induction motor
input-output feedback
linearization
fractional-order sliding mode controller
SVPWM
load torque observer
Opis:
Induction machines have of late become the most popular workhorses in the industry replacing DC machines because of their advantages, such as reduced cost, reliability and the absence of commutators, which make them adapt to unfavourable conditions with lower maintenance requirement. However, higher-order models of AC machines, nonlinearities in model equations, uncertainties in parameters and load disturbances make induction motors difficult to control than that of DC motors. In this paper, a robust control strategy considering the recent advances in technology is proposed employing input-output feedback linearization for the exact decoupling of electromagnetic torque and rotor flux using fractional-order sliding mode controller (SMC) for the outer speed loop. The sliding mode observer is also designed to extract the rotor flux from the DC input voltage of the inverter and stator current measurements. Finally, a comparison between the commonly used proportional integral and derivative (PID) controller and the proposed fractional-order SMCs is made and the conclusion is reached.
Źródło:
Power Electronics and Drives; 2020, 5, 40; 109-122
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration control and performance analysis of full car active suspension system using fractional order terminal sliding mode controller
Autorzy:
Yuvapriya, T.
Lakshami, P.
Rajendiran, S.
Powiązania:
https://bibliotekanauki.pl/articles/230099.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active suspension system
fractional order terminal sliding mode controller
ISO8608
ISO2631
stability analysis
vibration dose value
Opis:
The main goal of introducing Active Suspension System in vehicles is to reduce the vehicle body motion under road obstacles which improves the ride comfort of the passenger. In this paper, the Full Car Model (FCM) with seven Degrees of Freedom is considered and simulated by MATLAB/Simulink. The Terminal Sliding Mode Controller (TSMC) and Fractional Order Terminal Sliding Mode Controller (FOTSMC) are designed to enhance the ride quality, stability and passenger comfort for FCM. The designed FOTSMC has the ability to provide higher control accuracy in a finite time. The performances of the designed controllers are evaluated by measuring the vehicle body vibration in both angular and vertical direction under bump input and ISO-8608 random input against passive suspension system. The Frequency Weighted Root Mean Square (FWRMS) and Vibration dose value of Body Acceleration as per ISO-2631 are evaluated for FOTSMC, TSMC and PSS. The stability of the FCM is proved by Lyapunouv theory. Further analysis with sprung mass and speed variation of FCM demonstrate the robustness of proposed controller. To investigate the performances of designed controllers, comparison is made with existing Sliding Mode Controller (SMC) which proves that the designed FOTSMC performs better than existing SMC.
Źródło:
Archives of Control Sciences; 2020, 30, 2; 295-324
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cluster consensus of general fractional-order nonlinear multi agent systems via adaptive sliding mode controller
Autorzy:
Yaghoubi, Zahra
Talebi, Heidar Ali
Powiązania:
https://bibliotekanauki.pl/articles/230002.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nonlinear multi agent systems
cluster consensus
fractional-order systems
adaptive sliding mode controller
Opis:
In this paper cluster consensus is investigated for general fractional-order multi agent systems with nonlinear dynamics via adaptive sliding mode controller. First, cluster consensus for fractional-order nonlinear multi agent systems with general form is investigated. Then, cluster consensus for the fractional-order nonlinear multi agent systems with first-order and general form dynamics is investigated by using adaptive sliding mode controller. Sufficient conditions for achieving cluster consensus for general fractional-order nonlinear multi agent systems are proved based on algebraic graph theory, Lyapunov stability theorem and Mittag-Leffler function. Finally, simulation examples are presented for first-order and general form multi agent systems, i.e. a single-link flexible joint manipulator which demonstrates the efficiency of the proposed adaptive controller.
Źródło:
Archives of Control Sciences; 2019, 29, 4; 643-665
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency response based curve fitting approximation of fractional-order PID controllers
Autorzy:
Bingi, Kishore
Ibrahim, Rosdiazli
Karsiti, Mohd Noh
Hassam, Sabo Miya
Harindran, Vivekananda Rajah
Powiązania:
https://bibliotekanauki.pl/articles/331064.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
curve fitting
fractional order PID controller
frequency response
integer order approximation
Oustaloup approximation
Matsuda approximation
dopasowywanie krzywej
ułamkowy regulator PID
odpowiedź częstotliwościowa
Opis:
Fractional-order PID (FOPID) controllers have been used extensively in many control applications to achieve robust control performance. To implement these controllers, curve fitting approximation techniques are widely employed to obtain integer-order approximation of FOPID. The most popular and widely used approximation techniques include the Oustaloup, Matsuda and Cheraff approaches. However, these methods are unable to achieve the best approximation due to the limitation in the desired frequency range. Thus, this paper proposes a simple curve fitting based integer-order approximation method for a fractional-order integrator/differentiator using frequency response. The advantage of this technique is that it is simple and can fit the entire desired frequency range. Simulation results in the frequency domain show that the proposed approach produces better parameter approximation for the desired frequency range compared with the Oustaloup, refined Oustaloup and Matsuda techniques. Furthermore, time domain and stability analyses also validate the frequency domain results.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2019, 29, 2; 311-326
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Fractional Order PID Control of the Forced Air Heating System
Sterowanie PID ułamkowego rzędu układem ogrzewania powietrza
Autorzy:
Oprzędkiewicz, Krzysztof
Podsiadło, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/277420.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
Fractional Order PID controller
forced heating system
stability
ORA approximation
ułamkowy regulator PID
system ogrzewania powietrza
stabilność
aproksymacja ORA
Opis:
The paper presents the implementation of the Fractional Order PID controller to control the temperature in the isothermal room applied in a pharmaceutical factory. The formula of the controller dedicated to transfer function model of the temperature is proposed, the stability analysis using the Matignon Theorem is also presented. Results of simulations show that the proposed controller is able to assure the better control quality than PID controller tuned with the use of auto-tuning function.
Artykuł prezentuje implementację regulator PID ułamkowego rzędu (FOPID) do sterowania temperaturą w pomieszczeniu izotermicznym stosowanym w fabryce farmaceutycznej. Zaproponowano formułę regulatora dla modelu obiektu opisanego transmitancją oraz analizę stabilności z wykorzystaniem Tw. Matignona. Wyniki badań symulacyjnych wskazują, że proponowany regulator zapewnia lepszą jakość regulacji, niż typowy regulator PID dostrojony zużyciem autotuningu.
Źródło:
Pomiary Automatyka Robotyka; 2019, 23, 1; 5-10
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative study of 2DOF PID and 2DOF fractional order PID controllers on a class of unstable systems
Autorzy:
Bingi, K.
Ibrahim, R.
Karsiti, M. N.
Hassan, S. M.
Harindran, V. R.
Powiązania:
https://bibliotekanauki.pl/articles/229519.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional order controller
set-point weighting
2DOF PID
process control
unstable systems
Opis:
The proportional-integral-derivative (PID) controllers have experienced series of structural modifications and improvements. Example of such modifications are set-point weighting and fractional ordering. While the former is to achieve two-degree-of-freedom (2DOF) ability of set-point tracking and disturbance rejection, the latter is to ensure smooth control action. Therefore, this paper reviews various forms of PID controllers and provides a comparative analysis of 2DOF PID and 2DOF fractional order PID (FOPID) controllers. The paper also discusses the conversion of one PID form to another. For the comparative analysis of the various controllers, a class of unstable systems are considered. Simulation result shows that in most cases the conversion from one form to another does not significantly affect the performance of the system. It is also observed that the 2DOF controllers (2DOF PID and 2DOF FOPID) improved significantly the performance of the ordinary PID controllers.
Źródło:
Archives of Control Sciences; 2018, 28, 4; 635-682
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional order based computed torque control of 2-link robotic arm
Autorzy:
Anwaar, Haris
Yixin, Yin
Ijaz, Salman
Ashraf, Muhammad Ammar
Anwaar, Waqas
Powiązania:
https://bibliotekanauki.pl/articles/103321.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
fractional order PID controller
computed torque controller
2-link robotic arm
Nelder-Mead optimization
regulator PID
regulator momentu obrotowego
2-linkowe ramię robota
optymalizacja Neldera-Meada
Opis:
The paper proposes the application of fractional order controller in position tracking control of 2-link nonlinear robotic arm. The nonlinear system dynamics is linearized using inverse dynamics of the model and fractional order PID controller is designed to deal with remaining tracking errors. The optimal values of controller pa-rameters are calculated using Nelder-Mead optimization technique based on desired design criteria. The objective function is designed using weighted sum approach on each performance specification based on transient domain parameters. It can be seen from simulation results that fractional order controller together with computed torque controller improved tracking performance of proposed system as compared to PID controller used in the outer loop. Moreover, the robustness of proposed scheme is checked by applying the disturbance signal at control input channels of 2-link nonlinear robotic arm links.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 273-284
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of time delay on fractional-order PI-controlled system for a second-order oscillatory plant model with time delay
Autorzy:
Sadalla, T.
Horla, D.
Giernacki, W.
Kozierski, P.
Powiązania:
https://bibliotekanauki.pl/articles/140432.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional-order control
FOPI controller
stability analysis
time delay
tracking
Opis:
The paper aims at presenting the influence of an open-loop time delay on the stability and tracking performance of a second-order open-loop system and continuoustime fractional-order PI controller. The tuning method of this controller is based on Hermite- Biehler and Pontryagin theorems, and the tracking performance is evaluated on the basis of two integral performance indices, namely IAE and ISE. The paper extends the results and methodology presented in previous work of the authors to analysis of the influence of time delay on the closed-loop system taking its destabilizing properties into account, as well as concerning possible application of the presented results and used models.
Źródło:
Archives of Electrical Engineering; 2017, 66, 4; 693-704
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stabilization of positive descriptor fractional discrete-time linear system with two different fractional orders by decentralized controller
Autorzy:
Sajewski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/200198.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
positive
fractional
different order
noncomensurate
descriptor
stabilization
decentralized controller
pozytywny
deskryptor
stabilizacja
Opis:
Positive descriptor fractional discrete-time linear systems with fractional different orders are addressed in the paper. The decomposition of the regular pencil is used to extend necessary and sufficient conditions for positivity of the descriptor fractional discrete-time linear system with different fractional orders. A method for finding the decentralized controller for the class of positive systems is proposed and its effectiveness is demonstrated on a numerical example.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 5; 709-714
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of the fractional order PD controller in electro-hydraulic drive
Zastosowanie regulatora PD niecałkowitego rzędu w napędzie elektrohydraulicznym
Autorzy:
Rybarczyk, D.
Powiązania:
https://bibliotekanauki.pl/articles/275804.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
fractional order controller
electro-hydraulic drive
servo valve
regulator niecałkowitego rzędu
napęd elektrohydrauliczny
serwozawór
Opis:
This paper presents initial research on use of the fractional order PD controller of the electro-hydraulic drive – step response in open and close loop. Test stand built based on hydraulic cylinder combined with electro-hydraulic servo valve. Control system based on PLC with touch panel. Experimental investigation is performed for different coefficient of fractional PD regulator. The aim was to check power of s denominator changes impact in PD controller. Performed test stand allowed to conduct further comprehensive investigations use of the fractional order controller in electro-hydraulic drives.
W artykule opisano wstępne badania dotyczące zastosowania regulatora niecałkowitego rzędu w napędzie elektrohydraulicznym. Jako obiekt badań posłużył siłownik hydrauliczny połączony z serwozaworem. Układ sterowania zbudowano w oparciu o sterownik PLC z panelem dotykowym. Napęd poddano testom z zamkniętą i otwartą pętlą sprzężenia zwrotnego. Przebadano wpływ zmiany wartości poszczególnych parametrów regulatora niecałkowitego rzędu, w tym stopnia części różniczkującej.
Źródło:
Pomiary Automatyka Robotyka; 2017, 21, 1; 13-18
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of anisotropic rotor vibration using fractional order controller
Autorzy:
Czajkowski, M.
Gertner, M.
Ciulkin, M.
Powiązania:
https://bibliotekanauki.pl/articles/280540.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
rotor dynamic
active bearings
fractional order controller
Opis:
This article presents an analysis of a flexible Jeffcott rotor with an active bearing support. The rotor is coupled with lateral and torsional vibrations and a force from the unbalance vector derived from the Lagrangian method. The active support bearing is controlled by FOPID controller. Changing the rotor vibration is followed by shifting rotor angular speed and achieving the natural frequency. Simulation results demonstrate torsional and lateral vibration of thr rotor at the rotating speed near the natural frequency. Consequently, controlling the lateral vibrations mitigates potential damage and improves safety. FOPID controller introduces a new approach to vibration control of a rotating machine.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 3; 1013-1024
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PLC implementation of fractional PI controller in positioning of electrohydraulic servodrive
Autorzy:
Rybarczyk, D.
Powiązania:
https://bibliotekanauki.pl/articles/206664.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
fractional order controller
electrohydraulic drive
electrohydraulic servovalve
fractional order calculus
Opis:
The article describes the implementation of fractional order PI controller with the Programmable Logic Controller (PLC). The control system proposed is used for positioning of an electrohydraulic drive with Bosch Rexroth servo valve. The controller is based on PLC, working under real time operating system Automation Runtime. User interface is equipped with the touch panel of Power Panel 500 type. In the first part of the paper the fractional order calculus theory is introduced. In addition, some examples of fractional controller implementations in different kinds of objects are presented. The subsequent section focuses on author’s own research. The Oustaloup’s method description is recalled along with its computer implementation. Further, the impact of finite order of the approximation function is verified. The article includes the description of test stand structure, code generation and implementation of PI controller on the dedicated PLC.
Źródło:
Control and Cybernetics; 2016, 45, 3; 301-316
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie regulatora ułamkowego rzędu PD do automatycznego sterowania zamówieniami dla magazynu ze zmiennym w czasie opóźnieniem dostaw
Application of a Fractional Order PD Controller for Automatic Orders Control System for a Warehouse with Time-Varying Deliveries Delay
Autorzy:
Abrahamowicz, E.
Orłowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/275760.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
regulator niecałkowitego rzędu
system magazynowy
układ sterowania
zmienne opóźnienie
układ dyskretny
algorytm genetyczny
fractional order controller
inventory system
control systems
variable delay
discrete-time system
genetic algorithm
Opis:
W pracy zaproponowano wykorzystanie regulatora niecałkowitego rzędu w systemie magazynowym z automatycznym sterowaniem wielkością dostaw. Rozważania oparto na dyskretnym, niestacjonarnym, dynamicznym modelu systemu magazynowego ze zmiennym w czasie opóźnieniem. W układzie sterowania zamówieniami wykorzystano dyskretny regulator niecałkowitego rzędu PDμ, strukturę feedback-feedforward oraz zmodyfikowany predyktor Smitha. Parametry układu regulacji zostały wyznaczone w wyniku optymalizacji z wykorzystaniem algorytmu genetycznego. W celu oceny jakości regulacji zastosowane zostały wskaźniki jakości bazujące na ocenie zajętości powierzchni magazynowej oraz utraconych korzyści. Przedstawione zostały wyniki badań symulacyjnych dla regulatorów całkowitego oraz niecałkowitego rzędu, co umożliwiło dokonanie analizy porównawczej skuteczności działania obu regulatorów.
In the paper a fractional controller is employed in the automatic control warehouse system. A discrete, non-stationary and dynamic model with variable time delay of the inventory system is assumed. The control system uses a discrete fractional order feedback-feedforward PDμ controller with Smith predictor. The parameters of the control system are determined using numerical optimization – genetic algorithm. In order to assess the control quality a two quality indicators are employed. First one bases on an assessment of occupancy of warehouse space and second one the lost benefits. The simulation results are shown for two controllers: fractional controller and for comparison for classical integer order PD controller.
Źródło:
Pomiary Automatyka Robotyka; 2016, 20, 2; 5-10
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł

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